RESISTORS, INDUCTORS AND CAPACITORS 0 RESISTORS AND RESISTANCE 1 / 30 Category: ELECTRICAL 2 If two 10 ohm resistors are connected in series with a 10 volt battery, the power consumption would be: 5 watts 10 watts 100 watts 20 watts 2 / 30 Category: ELECTRICAL 2 If a carbon resistor’s temperature is increased, what will happen to the resistance? It will increase by 20% for every 10 degrees centigrade It will become time dependent It will change depending on the resistor’s temperature coefficient rating It will stay the same 3 / 30 Category: Electric Circuits Which of the following material has nearly zero temperature co-efficient of resistance? Copper Porcelain Carbon Manganin 4 / 30 Category: ELECTRICAL 2 What voltage would be needed to supply a current of 200 mA, to operate an electric lamp which has a resistance of 25 ohms? 5 volts 175 volts 225 volts 8 volts 5 / 30 Category: ELECTRICAL 2 Which series combination of resistors would replace a single 120 ohm resistor? two 62 ohm five 24 ohm six 22 ohm five 100 ohm 6 / 30 Category: Electrical 5 Ohm’s law states that resistor ‘R’ is directly proportional to Capacitance Inductance Voltage Current 7 / 30 Category: Physics Practice Test 5 The Potential difference of a battery is 2.2 V when it is connected across a resistance of 5 Ω. If suddenly the potential difference falls to 1.8 V, its internal resistance will be 1.1 Ω 2.1 Ω 2 Ω 1 Ω 8 / 30 Category: Electrical 5 A 5.0 ohm of resistor has current i=6.0sinωt(A), than power dissipated by the circuit will be 180sin²ωt 30sin²ωt 80sin²ωt 11sin²ωt 9 / 30 Category: ELECTRICAL 2 The total resistance of four 68 ohm resistors wired in parallel is: 272 ohms 17 ohms 12 ohms 34 ohms 10 / 30 Category: Electric Circuits The resistance of a conductor varies inversely as area of cross-section temperature resistivity length 11 / 30 Category: Physics Practice Test 5 The voltage of a device having resistance 5 Ω and current 4 A will be 10 V 25 V 20 V 15 V 12 / 30 Category: Electric Circuits You have to replace 1500 ohms resistor in radio. You have no 1500 ohms resistor but have several 1000 ohms ones. which you would connect three in series two in parallel three in parallel two in parallel and one in series 13 / 30 Category: ELECTRICAL 2 When two 500 ohm 1 watt resistors are connected in parallel, they can dissipate a maximum total power of 4 watts 1/2 watt 1 watt 2 watt 14 / 30 Category: ELECTRICAL 2 Two resistors are in parallel. Resistor A carries twice the current of resistor B, which means that: A has half the resistance of B the voltage across B is twice that across the voltage across A is twice that across B B has half the resistance of A 15 / 30 Category: ELECTRICAL 2 What are the possible values of a 100 ohm resistor with a 10% tolerance? 10 to 100 ohms 90 to 110 ohms 80 to 120 ohms 90 to 100 ohms 16 / 30 Category: ELECTRICAL 2 In a parallel circuit with a voltage source and several branch resistors, how is the total current related to the current in the branch resistors? It equals the average of the branch current through each resistor It is the sum of each resistor’s voltage drop multiplied by the total number of resistors It equals the sum of the branch current through each resistor It decreases as more parallel resistors are added to the circuit 17 / 30 Category: ELECTRICAL 2 One advantage of replacing a 50 ohm resistor with a parallel combination of two similarly rated 100 ohm resistors is that the parallel combination will have the same resistance but greater power rating lesser resistance and similar power rating greater resistance and similar power rating the same resistance but lesser power rating 18 / 30 Category: ELECTRICAL 2 Two resistors are connected in parallel and are connected across a 40 volt battery. If each resistor is 1000 ohms, the total current is: 80 amperes 40 amperes 40 milliamperes 80 milliamperes 19 / 30 Category: Electric Circuits The internal resistance of an ideal voltage source is infinite very low very high zero 20 / 30 Category: ELECTRICAL 2 A resistor with a colour code of brown, black, and red, would have a value of: 1000 ohms 100 ohms 10 000 ohms 10 ohms 21 / 30 Category: Electric Circuits The resistivity of a conductor with an increase in temperature. zero decreases increases remains the same 22 / 30 Category: Electrical 5 A 4.0 ohm of resistor has current i=2.5sinωt(A), than voltage across the circuit will be 10.0sinωt 6.5sinωt 8.5sinωt 5.0sinωt 23 / 30 Category: ELECTRICAL 2 The total resistance of resistors connected in series is: less than the resistance of any one resistor equal to the lowest resistance present equal to the highest resistance present greater than the resistance of any one resistor 24 / 30 Category: ELECTRICAL 2 A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much: current resistance power voltage 25 / 30 Category: ELECTRICAL 2 What do the first three-color bands on a resistor indicate? The value of the resistor in ohms The resistance tolerance in percent The power rating in watts The resistance material 26 / 30 Category: ELECTRICAL 2 If a 12-volt battery supplies 0.25 ampere to a circuit, what is the circuit’s resistance? 0.25 ohm 3 ohms 12 ohms 48 ohms 27 / 30 Category: Electrical 5 Those resistors, which values change with applied voltage and temperature are called constant resistor non linear resistors variable resistor linear resistors 28 / 30 Category: ELECTRICAL 2 What does the fourth color band on a resistor mean? The resistance material The resistance tolerance in percent The value of the resistor in ohms The power rating in watts 29 / 30 Category: Physics Practice Test 5 If Current is 0.75 A when a battery of 1.5 V is connected to the wire of 5 m having cross sectional area 2.5 × 10-7 m², the wire will have a resistivity of 1 × 10^-7 2.1 × 10^-7 2 × 10^-7 1.1 × 10^-7 30 / 30 Category: ELECTRICAL 2 If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor? 25 volts 48 volts 100 volts 52 volts Your score is LinkedIn Facebook Twitter Restart quiz Exit Send feedback
