Question 31 : What is f in terms of voltage?
1. f=cos^-1V/VR
2. f=cos^-1V*VR
3. f=cos^-1VR/V
4. f=tan^-1V/VR
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Question 32 : For an RL circuit, the phase angle is always ________
1. Positive
2. Negative
3. 0
4. 90
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Question 33 : Which, among the following, is the correct expression for f.
1. f=tan^-1 (XL/R)
2. f=tan^-1 (R/XL)
3. f=tan^-1 (XL*R)
4. f=cos^-1 (XL/R)
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Question 34 : A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a x V 50Hz sinusoidal supply. The current in the circuit is 8.2A. Calculate the value of x.
1. 10V
2. 50V
3. 100V
4. 120V
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Question 35 : A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the voltage across the inductor.
1. 52V
2. 82V
3. 65V
4. 76V
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Question 36 : A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the voltage across the resistor.
1. 31.8V
2. 57.4V
3. 67.3V
4. 78.2V
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Question 37 : A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the phase difference.
1. -55.1
2. 55.1
3. 66.1
4. -66.1
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Question 38 : A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the current in the circuit.
1. 2.2A
2. 4.2A
3. 6.2A
4. 8.2A
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Question 39 : In which device inductor cannot be used?
1. filter circuit
2. transformer
3. choke
4. dielectric
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Question 40 : In an inductive circuit, the current________ the voltage?
1. Leads
2. Lags
3. Is greater than
4. Is less than
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