KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 130 - 132 of 250

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 250 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 130

» Electronic Devices » Zener Diode

Appeared in Year: 2014

MCQ▾

Question

A certain p-n junction, having a depletion region of width 20 µm, was found to have a breakdown voltage of 100 V. If the width of the depletion region is reduced to 1 µm during its production, then it can be used as a Zener diode for voltage regulation of –

Choices

Choice (4) Response

a.

5 V

b.

2000 V

c.

7.5 V

d.

10 V

Question number: 131

» Electrostatics » Electric Potential

Appeared in Year: 2015

MCQ▾

Question

An ac voltmeter connected between points A and B in the circuit below reads 36 V. If it is connected between A and C, the reading is 39 V. The reading when it is connected between B and D is 25 V. What will the voltmeter read when it is connected between A and D? (Assume that the voltmeter reads true ems voltage value and that the source generates a pure ac. )

RLC - series circuit diagram

RLC - Series Circuit Diagram

In figure a RLC series circuit diagram is shown.

Choices

Choice (4) Response

a.

3361V

b.

481V

c.

31V

d.

61V

Question number: 132

» Electrostatics » Capacitors

MCQ▾

Question

Three identical parallel plate capacitors of capacitance 2 µF each are connected in series with a battery of emf, 10 V as shown. Q is the charge on the capacitor. If two of the capacitors are now filled with a dielectric of dielectric constant k, the amount of charge which will flow through the battery is (neglect internal resistance of the battery)

Circuit diagram of three capacitors and a battery

Circuit Diagram of Three Capacitors and a Battery

In figure a circuit diagram consist of three capacitors and a battery is shown.

Choices

Choice (4) Response

a.

Q2(k1)(k+1)

b.

Q(k1k+2)

c.

Q(k+2k2)

d.

2Q(k1)(k+2)

Sign In