A:-change the frequency of applied AC voltage
B:-transfer electrical energy from one circuit to another without any direct electrical connection
B:-transfer electrical energy from one circuit to another without any direct electrical connection
C:-convert applied DC into AC
D:-convert applied AC into DC
D:-convert applied AC into DC
Correct Answer:- Option-B
2:-A 3-phase transformer has .
A:-1 primary and 3 secondary windings
2:-A 3-phase transformer has .
A:-1 primary and 3 secondary windings
B:-3 primary and 1 secondary windings
C:-3 primary and 3 secondary windings
D:-3 primary and 6 secondary windings
Correct Answer:- Option-C
3:-A transformer has 800 turns in its primary winding and 200 in its secondary what is the primary voltage, if the secondary voltage is 40 V? Assume transformer losses as negligible?
A:-8 V
B:-16 V
C:-40 V
3:-A transformer has 800 turns in its primary winding and 200 in its secondary what is the primary voltage, if the secondary voltage is 40 V? Assume transformer losses as negligible?
A:-8 V
B:-16 V
C:-40 V
D:-160 V
Correct Answer:- Option-D
4:-Efficiency of a transformer is the ratio of .
A:-Output power to input power
Correct Answer:- Option-D
4:-Efficiency of a transformer is the ratio of .
A:-Output power to input power
B:-Input power to output power
C:-Input current to output current
D:-Output current to input current
D:-Output current to input current
Correct Answer:- Option-A
5:-The basic unit of capacitance is .
A:-Ohm
5:-The basic unit of capacitance is .
A:-Ohm
B:-Farad
C:-Henry
D:-Mho
Correct Answer:- Option-B
6:-The relationship between charge (Q), voltage (V) and capacitance (C) of a capacitor is .
A:-C = Q/V
Correct Answer:- Option-B
6:-The relationship between charge (Q), voltage (V) and capacitance (C) of a capacitor is .
A:-C = Q/V
B:-C = QV
C:-`"C=Q^2 V"`
C:-`"C=Q^2 V"`
D:-C = V/Q
Correct Answer:- Option-A
7:-Identify the instrument which is NOT used for measurement of capacitance .
A:-Digital capacitance meter
Correct Answer:- Option-A
7:-Identify the instrument which is NOT used for measurement of capacitance .
A:-Digital capacitance meter
B:-AC bridge
C:-RLC meter
C:-RLC meter
D:-Kelvin bridge
Correct Answer:- Option-D
8:-The capacitive reactance Xc is given by .
A:-2`Pi`FC
Correct Answer:- Option-D
8:-The capacitive reactance Xc is given by .
A:-2`Pi`FC
B:-1/2`Pi`FC
C:-2`Pi`/FC
D:-FC/2`Pi`
Correct Answer:- Option-B
9:-Current flowing through a capacitor is given by .
A:-`"V.X_c"`
B:-`"V^2/X_c"`
Correct Answer:- Option-B
9:-Current flowing through a capacitor is given by .
A:-`"V.X_c"`
B:-`"V^2/X_c"`
C:-`"V/X_c"`
D:-`"V^2.C"`
Correct Answer:- Option-C
10:-A semi conductor in its pure form is referred to as .
A:-Intrinsic semiconductor
D:-`"V^2.C"`
Correct Answer:- Option-C
10:-A semi conductor in its pure form is referred to as .
A:-Intrinsic semiconductor
B:-Extrinsic semiconductor
C:-Crystal semiconductor
D:-Doped semiconductor
Correct Answer:- Option-A
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