**Ques.141. **Insulators have:-

- Conducting Paths
- An empty conduction band
**A large energy gap✓**- A full valence band

**Ques.142.** The capacitance of a capacitor is ______ the distance between the metal plates.

**Inversely proportional to✓**- Independent of
- Directly proportional to the square of
- Directly proportional to

**Ques.143.** Determine the current flowing through the 7-Ω and 3Ω resistors, respectively in the following circuit

- 5A and 4.8 A
**10.56 A and 24.64A✓**- 11.254 A and 9.582 A
- 2A and 4A

**Ques.144.** Which of the following statements is applicable for a three-phase AC circuit for a star connection?

**Phase voltage is square root three times the line voltage and phase current is equal to the line current.✓**- Phase voltage is equal to the line current and line current is equal to the phase voltage.
- Phase voltage is equal to line voltage and phase current is three times the line current
- Phase voltage is equal to the line voltage and line current is equal to the phase current

**Ques.145.** For a star connected load being measured for power by the two-wattmeter method, if W_{1} = V_{L}I_{L}cos(30 − φ)** **and W_{2} = V_{L}I_{L}cos(30 + φ), then the total 3-phase power will be:-

- 3V
_{ph}I_{ph}sinφ **√3V**_{L}I_{L}cosφ✓- √3V
_{ph}I_{ph}sin(30 + φ) - √3V
_{L}I_{L}cos(30 + φ)

**Ques.146.** The wattmeter method is used to measure the power in a three-phase load. The wattmeter readings are 400 W and −35 W. What will be the power factor?

- 0.85
- 0.9
**0.43✓**- 0.635

**Ques.147.** Which of the following is NOT conductive material?

- Copper
**Germanium✓**- Tungsten
- Platinum

**Ques.148.** Which of the statements is correct for a permanent magnetic material?

**The residual induction and the coercive field should be large✓**- The area of the hysteresis loop should be small.
- The initial relative permeability should be small.
- The residual induction and the coercive field should be small.

**Ques.149.** An alternating current is given by i = 100sin314t A. Its average value will be_______

- 70.7 A
**63.7 A✓**- 100 A
- 50 A

**Ques.150.** For a delta connected load being measured for power by the two-wattmeter method, if W_{1} = V_{1}I_{1}cos(30 − φ)** **and W_{2} = V_{L}I_{L}cos(30 + φ), then the total 3-phase power will be:-

- 3V
_{ph}I_{ph}sinφ **√3V**_{L}I_{L}cosφ✓- √3V
_{ph}I_{ph}sin(30 + φ) - √3V
_{L}I_{L}cos(30 + φ)

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