Question 1 : The value of the following is given by 100 (kilo ampere ) x ( micro ampere ) 100 milli ampere * 10 ampere
1. 0.001 A
2. 0.1 A
3. 10A.
4. 0.041666667
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Question 2 : A circuit contains two un-equal resistances in parallel
1. potential difference across each is same
2. smaller resistance has smaller conductance.
3. large current flows in larger resistor
4. current is same in both
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Question 3 : Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to 250 volts supply. Power consumed in circuit is
1. 33 watt
2. 100 watt
3. 67 watt
4. 300 watt.
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Question 4 : Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is
1. 4 r
2. 2 r
3. r / 2
4. r / 4.
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Question 5 : Superposition theorem is not applicable for
1. voltage calculation
2. bilateral elements
3. passive elements
4. power calculations
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Question 6 : Which of the following theorem is applicable for both linear and non-linear circuits ?
1. None of these
2. Norton theorem
3. Superposition theorem
4. Thevenin theorem
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Question 7 : The resistance of a coil is 4.2 Ω at 100°C and the temperature coefficient of resistance of its material is 0.004 °C. Its resistance at Q °C is
1. 5Ω
2. 6.5 C
3. 3Ω
4. 4Ω
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Question 8 : A cell of internal resistance 3 ohm and emf 1 volt is connected to a uniform wire of length 500 em and resistance 3 ohm. The potential gradient in the wire is
1. 30 mV/cm
2. 1 mV/cm
3. 4 mV/cm
4. 20 mV/cm
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Question 9 : The resistors of resistances 2 Ω, 4 Ω and 8 Ω are connected in parallel, then the equivalent resistance of the combination will be
1. 7/4 Ω
2. 8/7 Ω
3. 7/8 Ω
4. 4/9 Ω
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Question 10 : The charge on an electron is known to be 1.6 x 10-19 coulomb. In a circuit the current flowing is 1 A. How many electrons will be flowing through the circuit in a second?
1. 0.625 x 10¹⁹
2. 1.6 x 10^-19
3. 1.6 x 10¹⁹
4. 0.625 x 10¹².
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