KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 147 - 150 of 250

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Question number: 147

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2015

MCQ▾

Question

A wire bent in the shape of a regular n polygonal loop carries a steady current I. Let I be the perpendicular distance of a given segment and R be the distance of given segment and R be the distance of a vertex both from the centre of the loop. The magnitude of the magnetic field at the centre of the loop is given by.

Choices

Choice (4) Response
a.

nμoI2πIcos(πn)

b.

nμ0I2πRcos(πn)

c.

nμ0I2πlsin(πn)

d.

nμ0I2πRsin(πn)

Question number: 148

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The breaking strength of thread of a simple pendulum, whose bob has mass m, is 2 mg. What is the maximum angular amplitude that can be given to the pendulum?

Choices

Choice (4) Response
a.

520

b.

600

c.

480

d.

400

Question number: 149

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A 1.5 kg object travelling with uniform acceleration covers 16 m in 4th second and 20 m in 5th second. Which of the following is correct?

Choices

Choice (4) Response
a.

The force on the object is 6N.

b.

The initial velocity of the object is 2 ms-1

c.

The acceleration of the object is 4 ms-2.

d. All a. , b. and c. are correct

Question number: 150

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The breaking strength of thread of a simple pendulum, whose bob has mass m, is 4 mg. What is the maximum angular amplitude that can be given to the pendulum?

Choices

Choice (4) Response
a.

450

b.

600

c.

700

d.

300

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