Physics-
General
Easy
Question
An electron moves along the line PQ which lies in the same plane as a circular loop of conducting wire as shown in figure. What will be the direction of the induced current in the loop?
- Anticlockwise
- Clockwise
- Alternating
- No current will be induced
- Anticlockwise
- Clockwise
- Alternating
- No current will be induced
The correct answer is: Anticlockwise
From right hand thumb rule, the magnetic field passing through the loop due to the current will be perpendicular to the plane of the page pointing downwards. The direction of current in the loop will be such as to oppose the increase of this field (Lenz’s law), hence direction of induced current in the loop is anticlockwise.
Related Questions to study
Physics-
In 0.1 s, the current in a coil increases from 1A to 1.5 A. If inductance of coil is 60mH, then induced current in external resistance of will be
In 0.1 s, the current in a coil increases from 1A to 1.5 A. If inductance of coil is 60mH, then induced current in external resistance of will be
Physics-General
Physics-
A body is in pure rotation. The linear speed of a particle, the distance r of the particle from the axis and the angular velocity of the body are related as = . Thus-
A body is in pure rotation. The linear speed of a particle, the distance r of the particle from the axis and the angular velocity of the body are related as = . Thus-
Physics-General
Physics-
Let be a unit vector along the axis of rotation of a purely rotating body and be a unit vector along the velocity of a particle P of the body away from the axis. The value of is-
Let be a unit vector along the axis of rotation of a purely rotating body and be a unit vector along the velocity of a particle P of the body away from the axis. The value of is-
Physics-General
Physics-
If the position vector of a particle is metre and its angular velocity is rad/sec then its linear velocity is (in m/s)-
If the position vector of a particle is metre and its angular velocity is rad/sec then its linear velocity is (in m/s)-
Physics-General
Physics-
A chain couples and rotates two wheels in a bicycle. The radii of bigger and smaller wheels in a bicycle. The radii of bigger and smaller wheels are 0.5m and 0.1m respectively. The bigger wheel rotates at the rate of 200 rotations per minute, then the rate of rotation of smaller wheel will be -
A chain couples and rotates two wheels in a bicycle. The radii of bigger and smaller wheels in a bicycle. The radii of bigger and smaller wheels are 0.5m and 0.1m respectively. The bigger wheel rotates at the rate of 200 rotations per minute, then the rate of rotation of smaller wheel will be -
Physics-General
Physics-
On account of the earth rotating about its axis-
On account of the earth rotating about its axis-
Physics-General
Physics-
A particle is moving with a constant angular velocity about an exterior axis. Its linear velocity will depend upon -
A particle is moving with a constant angular velocity about an exterior axis. Its linear velocity will depend upon -
Physics-General
Physics-
Figure shows a small wheel fixed coaxially on a bigger one of double the radius. The system rotates about the common axis. The strings supporting A and B do not slip on the wheels. If x and y be the distances travelled by A and B in the same time interval, then-
Figure shows a small wheel fixed coaxially on a bigger one of double the radius. The system rotates about the common axis. The strings supporting A and B do not slip on the wheels. If x and y be the distances travelled by A and B in the same time interval, then-
Physics-General
Physics-General
Physics-
A body rotates at 300 rotations per minute. The value in radian of the angle described in 1 sec is-
A body rotates at 300 rotations per minute. The value in radian of the angle described in 1 sec is-
Physics-General
Physics-
A wheel starts rotating from rest and attains an angular velocity of 60 rad/sec in 5 seconds. The total angular displacement in radians will be-
A wheel starts rotating from rest and attains an angular velocity of 60 rad/sec in 5 seconds. The total angular displacement in radians will be-
Physics-General
Physics-
The moment of inertia of a body is I and its coefficient of linear expansion is if temperature of body rises by a small amount T. Then change in moment of inertia about the same axis –
The moment of inertia of a body is I and its coefficient of linear expansion is if temperature of body rises by a small amount T. Then change in moment of inertia about the same axis –
Physics-General
Physics-
A rod of mass m and length l is hinged at one of its end A as shown in figure. A force F is applied at a distance x from A. The acceleration of centre of mass (a) varies with x as –
A rod of mass m and length l is hinged at one of its end A as shown in figure. A force F is applied at a distance x from A. The acceleration of centre of mass (a) varies with x as –
Physics-General
Physics-General
Physics-
A loop of radius 3 meter and weighs 150 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 15 cm/sec. How much work has to be done to stop it –
A loop of radius 3 meter and weighs 150 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 15 cm/sec. How much work has to be done to stop it –
Physics-General
Physics-
Two loops P and Q are made from a uniform wire. The radii of P and Q are r1 and r2 respectively, and their moments of inertia are I1 and I2 respectively. If I2 = 4I1 , then equals –
Two loops P and Q are made from a uniform wire. The radii of P and Q are r1 and r2 respectively, and their moments of inertia are I1 and I2 respectively. If I2 = 4I1 , then equals –
Physics-General
Physics-
The angular speed of rotating rigid body is increased from 4 to 5 . The percentage increase in its K.E. is –
The angular speed of rotating rigid body is increased from 4 to 5 . The percentage increase in its K.E. is –
Physics-General