RESISTORS, INDUCTORS AND CAPACITORS 0 RESISTORS AND RESISTANCE 1 / 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 decreases as more parallel resistors are added to the circuit It equals the sum 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 average of the branch current through each resistor 2 / 30 Category: ELECTRICAL 2 When two 500 ohm 1 watt resistors are connected in parallel, they can dissipate a maximum total power of 1 watt 2 watt 1/2 watt 4 watts 3 / 30 Category: ELECTRICAL 2 Which tolerance rating would a high-quality resistor have? 20% 10% 0.1% 5% 4 / 30 Category: ELECTRICAL 2 If a carbon resistor’s temperature is increased, what will happen to the resistance? It will change depending on the resistor’s temperature coefficient rating It will increase by 20% for every 10 degrees centigrade It will become time dependent It will stay the same 5 / 30 Category: Physics Practice Test 5 When the condition R1/R2 = R3/R4 is satisfied, the current in the galvanometer of Wheatstone bridge is R3/R2 R1/R3 0 1 6 / 30 Category: Electric Circuits The internal resistance of an ideal voltage source is zero very high infinite very low 7 / 30 Category: ELECTRICAL 2 If a 12-volt battery supplies 0.25 ampere to a circuit, what is the circuit’s resistance? 12 ohms 48 ohms 3 ohms 0.25 ohm 8 / 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 greater resistance and similar power rating the same resistance but greater power rating the same resistance but lesser power rating lesser resistance and similar power rating 9 / 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? 175 volts 8 volts 5 volts 225 volts 10 / 30 Category: ELECTRICAL 2 A resistor with a colour code of brown, black, and red, would have a value of: 1000 ohms 10 000 ohms 100 ohms 10 ohms 11 / 30 Category: ELECTRICAL 2 What does the fourth color band on a resistor mean? The value of the resistor in ohms The resistance tolerance in percent The power rating in watts The resistance material 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 two in parallel and one in series two in parallel three in series three in parallel 13 / 30 Category: Electric Circuits The resistance of a conductor varies inversely as resistivity temperature length area of cross-section 14 / 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 1.1 × 10^-7 1 × 10^-7 2.1 × 10^-7 2 × 10^-7 15 / 30 Category: Physics Practice Test 5 The voltage of a device having resistance 5 Ω and current 4 A will be 25 V 15 V 20 V 10 V 16 / 30 Category: Electric Circuits Two resistors are said to be connected in series when same current passes in turn through both total current equals the sum of branch currents sum of IR drops equals the applied e.m.f both carry the same value of current 17 / 30 Category: Electric Circuits The resistivity of a conductor with an increase in temperature. remains the same zero decreases increases 18 / 30 Category: ELECTRICAL 2 The total resistance of four 68 ohm resistors wired in parallel is: 34 ohms 272 ohms 17 ohms 12 ohms 19 / 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 100 watts 10 watts 20 watts 20 / 30 Category: ELECTRICAL 2 Which series combination of resistors would replace a single 120 ohm resistor? five 24 ohm five 100 ohm six 22 ohm two 62 ohm 21 / 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 22 / 30 Category: Electric Circuits Which of the following material has nearly zero temperature co-efficient of resistance? Carbon Copper Manganin Porcelain 23 / 30 Category: Electrical 5 Ohm’s law states that resistor ‘R’ is directly proportional to Current Voltage Inductance Capacitance 24 / 30 Category: Physics Practice Test 5 Bar of iron 2 cm × 2 cm having area 4 cm² and resistivity of 11 × 10^-8 Ω meter will have resistance of 1.1 × 10^-4 Ω 3.1 × 10^-4 Ω 4.1 × 10^-4 Ω 2.1 × 10^-4 Ω 25 / 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 11sin²ωt 80sin²ωt 30sin²ωt 26 / 30 Category: ELECTRICAL 2 If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor? 100 volts 25 volts 48 volts 52 volts 27 / 30 Category: Physics Practice Test 5 The Gold color of the resistance shows a tolerance up to the 5% 10% 0.01 0.02 28 / 30 Category: ELECTRICAL 2 The total resistance of resistors connected in series is: equal to the highest resistance present equal to the lowest resistance present less than the resistance of any one resistor greater than the resistance of any one resistor 29 / 30 Category: Electrical 5 A 4.0 ohm of resistor has current i=2.5sinωt(A), than voltage across the circuit will be 6.5sinωt 8.5sinωt 10.0sinωt 5.0sinωt 30 / 30 Category: Electrical 5 Those resistors, which values change with applied voltage and temperature are called variable resistor linear resistors non linear resistors constant resistor Your score is LinkedIn Facebook Twitter Restart quiz Exit Send feedback
