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General
Easy
Question
A particle moves in a circle of radius . Its linear speed is given by where in second and in . Find out its radial and tangential acceleration at respectively
The correct answer is:
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An airplane, diving at an angle of with the vertical releases a projectile at an altitude of 730 m. The projectile hits the ground 5.00 s after being released. What is the speed of the aircraft?
An airplane, diving at an angle of with the vertical releases a projectile at an altitude of 730 m. The projectile hits the ground 5.00 s after being released. What is the speed of the aircraft?
Physics-General
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A solenoid has 2000 turns wound over a length of 0.30 m. The area of its cross-section is Around its central section a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25s, the emf induced in the coil is
A solenoid has 2000 turns wound over a length of 0.30 m. The area of its cross-section is Around its central section a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25s, the emf induced in the coil is
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The alternating voltage induced in the secondary coil of a transformer is mainly due to
The alternating voltage induced in the secondary coil of a transformer is mainly due to
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In a coil rate of change of area is and current between becomes 1 from in . If magnitude of field is inductance of the coil is
In a coil rate of change of area is and current between becomes 1 from in . If magnitude of field is inductance of the coil is
Physics-General
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An inductance and a resistance are first connected to a battery. After some time the battery is disconnected but and remain connected in a closed circuit. Then the current reduces to 37% of its initial value in
An inductance and a resistance are first connected to a battery. After some time the battery is disconnected but and remain connected in a closed circuit. Then the current reduces to 37% of its initial value in
Physics-General
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A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately
A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately
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In the diagram shown if a bar magnet is moved along the common axis of two single turn coils and in the direction of arrow
In the diagram shown if a bar magnet is moved along the common axis of two single turn coils and in the direction of arrow
Physics-General
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A square loop of side is converted into circular loop in . A uniform magnetic field of directed normal to the loop then the induced in the loop is
A square loop of side is converted into circular loop in . A uniform magnetic field of directed normal to the loop then the induced in the loop is
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A rectangular loop is being pulled at a constant speed , through a region of certain thickness , in which a uniform magnetic field is set up. The graph between position of the right hand edge of the loop and the induced emfwill be
A rectangular loop is being pulled at a constant speed , through a region of certain thickness , in which a uniform magnetic field is set up. The graph between position of the right hand edge of the loop and the induced emfwill be
Physics-General
Physics-General
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A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
Physics-General
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In an ideal transformer the number of turns of primary and secondary coil is given as 100 and 300 respectively. If the power input is , the power output is
In an ideal transformer the number of turns of primary and secondary coil is given as 100 and 300 respectively. If the power input is , the power output is
Physics-General
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Two stones are projected with same velocity at an angle and . If and are greatest heights in the two paths, what is the relation between and ?
Two stones are projected with same velocity at an angle and . If and are greatest heights in the two paths, what is the relation between and ?
Physics-General
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A fighter plane enters inside the enemy territory, at time with velocity and moves horizontally with constant acceleration (see figure). An enemy tank at the border, spot the plane and fire shots at an angle with the horizontal and with velocity . At what altitude of the plane it can be hit by the shot?
A fighter plane enters inside the enemy territory, at time with velocity and moves horizontally with constant acceleration (see figure). An enemy tank at the border, spot the plane and fire shots at an angle with the horizontal and with velocity . At what altitude of the plane it can be hit by the shot?Physics-General
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A bullet is to be fired with a speed of to hit a target away on a level ground. If , the gun should be aimed
A bullet is to be fired with a speed of to hit a target away on a level ground. If , the gun should be aimed
Physics-General
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What is the numerical value of the vector
What is the numerical value of the vector
Physics-General