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Three cells each of emf, 1.0 V, and internal resistance, 2 Ω, are connected in parallel across a 3Ω resistor. Determine the current in the resistor.

A. 0.90A B. 0.39A C. 0.30A D. 0.01A Correct Answer: Option C = 0.30A

3 years ago

In a series R-L-C circuit at resonance; impedance is?

A. maximum B. minimum C. capacitive D. inductive Correct Answer: Option A - maximum Explanation Since the current flowing through…

3 years ago

An inductor of inductance 10 H is connected across an a.c circuit source of 50 V, 100 Hz. What is the current in the circuit? [π = 3.14]

A. 0.200A B. 0.070A C. 0.050A D. 0.008A Correct Answer: Option D = 0.008A

3 years ago

The speed of fast-moving neutrons in a nuclear reactor can be reduced by using?

A. graphite rods B. concrete shield C. iron rods D. boron rods Correct Answer: Option A - graphite rods Explanation…

3 years ago

Which of the following statements about electric potential energy is not correct?

A. The electric potential energy of a positively charged particle increases when it moves to a point of higher potential…

3 years ago

A galvanometer with a full-scale deflection of 20 mA is Converted to read 8 K by connecting a 395 Ω resistor in series with it. Determine the internal resistance of the galvanometer

A. 2.5Ω B. 5.0Ω C. 8.0Ω D. 10.0Ω Correct Answer: Option B = 5.0Ω Explanation r = resistance of the…

3 years ago

A body of mass, M, moving with velocity, V, has a wavelength, X, associated with it. This phenomenon is called?

A. photoelectric effect B. heisenberg's uncertainty principle C. compton effect D. wave-particles paradox Correct Answer: Option A - photoelectric effect…

3 years ago

The magnetic material produced from the chemical combination of metal oxides and has a very high resistance to electric current is called?

A. ferrite substance B. paramagnetic substance C. ferromagnetic substance D. diamagnetic substance Correct Answer: Option A - ferrite substance Explanation…

3 years ago

Which of the following statements about a straight current-carrying wire placed in a uniform magnetic field is correct? The wire experiences?

A. maximum motor force if the current reverses its direction B. no motor force of it is parallel to the…

3 years ago

The period of a 10 kHz radio wave traveling at 108 ms−1 is?

A. 3.0 x 10−5s B. 1.0 x 10−4 s C. 1.0 x 104s D. 3.0 x 104s Correct Answer: Option…

3 years ago
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