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Two plane mirrors are inclined at angle θ if any ray incident on one mirror becomes anti-parallel after reflection from other mirror then angle θ can be

Two plane mirrors are inclined at an angle theta. If any ray incident on one mirror becomes anti-parallel after reflection from another mirror... View Article

An open pipe of length 33 cm resonates with frequency of 750 hz if the speed of the sound is 330 m/s then this frequency is

An open pipe of length 33 cm resonates with frequency of 750 hz if the speed of the sound is 330 m/s then this frequency is 1.the first harmonic... View Article

Two coils have a mutual inductance of 0.01 H. The current changes in the first coil according to the equation I = 5sin 200πt. What is the maximum value of emf induced in the second coil?

Π V 10π V 0.1π V 0.01 π V Answer: 10π V... View Article

The momentum of a body in two perpendicular direction at any time t are given by px 2t2 4 n s and py 3t2 6 n s the force acting on the body at t 0 will be

The momentum of a body in two perpendicular direction at any time t are given by Px = 2t2 + 6 and Py = 3t2/2 + 3. The force acting on the... View Article

An ideal heat engine operates between 227c and 127c it absorbs 5 kcal of heat at higher temperature what is heat rejected to sink?

An ideal heat engine operates between 227°C and 127°C. It absorbs 5 kcal of heat at higher temperatures. What is the heat rejected to sink? (a) 3... View Article

A charge q is moved from a to c along the path abc as shown in figure the work done in moving charge from a to c is

A charge q is moved from A to C along with the path ABC as shown in the figure the work done in moving charge from A to C is Answer: The work... View Article

If resistance of voltmeter is 40 ω then error in reading of voltmeter is 5n find the value of n

In the given circuit, the resistance of the circuit is 4kΩ, then the error in the reading of the voltmeter wil be (a) 68 % (b) 33.3 % (c) 50 %... View Article

A galvanometer has resistance of 63 ω in order to send only 10 of main current through this galvanometer the resistance of required shunt is

A galvanometer has resistance of 900 ohms. In order to send only 10 % of main current through this galvanometer the resistance of required shunt... View Article

In the circuit diagram the input is across the terminal a and c and the output is across b and d then output is

In the circuit diagram the input is across the terminal a and c and the output is across b and d then output is (a) same as input (b) zero (c)... View Article

The primary winding of an ideal transformer has 1000 turns whereas its secondary has 5000 turns the primary is connected to an ac supply of 220 v 50 hz the secondary will have an output of

The primary winding of an ideal transformer has 1000 turns whereas its secondary has 5000 turns. The primary is connected to an a supply of 220 V... View Article

In a particular system, the units of length mass and time are chosen to be 10 cm, 100 g and 0.1 s respectively. One newton force will be equal to how many units in this new system?

In a particular system, the units of length mass and time are chosen to be 10 cm, 100 g and 0.1 s respectively. One newton force will be equal to... View Article

If λ1 λ2 λ3 are wavelength of the waves produced by fundamental first overtone and second overtone frequency respectively of an open organ pipe then the ratio of λ1 λ2 λ3

If λ1 λ2 λ3 are the wavelength of the waves produced by fundamental first overtone and second overtone frequency... View Article

An elevator descends into a mineshaft at the rate of 7 meters per minute if the descent starts 10 meters above the ground level how long will it take to reach 410 meters below the ground level?

An elevator descends into a mine shaft at the rate of 7 meters per minute if the descent starts 10 meters above the ground level how long will it... View Article

Two aluminium wires have lengths 1 m and 2 m and theIRR diameters are d and d if they are stretched by applying equal forces the ratio of increase in theIRR lengths will be

Two aluminium wires have lengths in the ratio 1:2, and their radii are in the ratio 1:√2. If they stretched by applying the same force,... View Article

A ray of light travelling in vacuum enters into a medium of refractive index μ it is found that angle of refraction is half of the angle of incidence then value of angle of incidence is

A ray of light travelling in a vacuum enters into a medium of refractive index μ. It is found that angle of refraction is half of the angle of... View Article

The variation of the intensity of magnetisation with respect to the magnetising field in a diamagnetic substance is described by the graph in figure

The variation of the intensity of magnetisation with respect to the magnetising field in a diamagnetic substance is described by the graph in... View Article

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