Options:
- A. C/R
- B. R/C
- C. 1/RC
- D. 1/ 2RC
View Answer
C. 1/RC
Physics
The rectangular coordinate system is also called______________?
Options:
- A. Polar coordinate system
- B. Cartesian coordinate system
- C. Cylindrical coordinate system
- D. Spherical coordinate system
View Answer
B. Cartesian coordinate system
A 10? electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?
Options:
- A. 220V
- B. 220/ 2V
- C. 110V
- D. 220 ?2V
View Answer
D. 220 ?2V
A choke is used as a resistance in_________________?
Options:
- A. DC circuit
- B. AC circuits
- C. Both AC and DC circuit
- D. Full wave rectifier circuit
View Answer
B. AC circuits
At resonance the value of the power factor in an L-C-R series circuit is_______________?
Options:
- A. Zero
- B. 2
- C. 1
- D. Not definite
View Answer
C. 1
An A.C series circuit containing 4? resistance and 3? inductive reactance. The impedance of the circuit is______________?
Options:
- A. 1?
- B. 5?
- C. 7?
- D. 7?
View Answer
B. 5?
An inductive coil has a resistance of 100?. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45?. What is the inductance of the coil ?
Options:
- A. 10mH
- B. 12mH
- C. 16mH
- D. 20mH
View Answer
C. 16mH
Choose the correct statement. In the case of AC circuit ohms law holds for_______________?
Options:
- A. Peak values of voltage and current
- B. Effective values of voltage and current
- C. Instantaneous values of voltage and current
- D. All of the above
View Answer
D. All of the above
pure resistor circuit the voltage and current are_______________?
Options:
- A. Lagging each other
- B. They are at 90? phase difference
- C. They have zero phase difference
- D. No phase difference
View Answer
C. They have zero phase difference
The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________?
Options:
- A. Zero
- B. 45
- C. 90
- D. 180
View Answer
A. Zero