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Two drops of same radius are falling through aIRR with terminal velocity of 10 m/s. If these two drops coalesce, then terminal velocity of new drop will be

Terminal velocity is defined as the highest velocity that is attained by an object as it falls through a fluid. When the sum of drag force and... View Article

Two balls of equal mass undergo head-on collision while each was moving with a speed of 6 m/s. If the coefficient of restitution is 1/3, the speed of each ball after impact will be

A head-on collision happens when the velocities of both particles are along the line of collision. This can be regarded as a collision in one... View Article

A nearsighted man can clearly see objects up to a distance of 2m. Calculate the power of the lens of the spectacles necessary for the remedy of this defect.

Myopia or Nearsightedness occurs when the eye loses its ability to focus on far-off objects as the lenses do not possess a long focal length.... View Article

Current I is moving in a regular hexagon shaped loop of side length a. What is the magnetic field at the centre of hexagon?

The magnetic field is an invisible space around a magnetic object. A magnetic field is basically used to describe the distribution of magnetic... View Article

In the arrangement of resistances shown below. The effective resistance between points A and B is

n a complex circuit consisting of two or more resistors, the effective resistance is the measure of the total resistance of all the resistor... View Article

In an electrochemical process, a salt bridge is used to _______

In an electrochemical process, a salt bridge is used to maintain the charge balance in the two half cells Solution A salt bridge is a... View Article

The moment of a magnet (15cm×2cm×1cm) is 1.2Am₂. What is its intensity of magnetisation?

The electrons circulating around the nucleus have a magnetic moment. When the material is not magnetised the magnetic dipole moment sum up to... View Article

A galvanometer with resistance 100 Ω gives full scale deflection with a current of 10 mA. The value of shunt, in order to convert it into an ammeter of 10 ampere range, will be

A galvanometer is a device that is used to detect a small electric current or measure its magnitude. The current and its intensity is usually... View Article

A charge Q is placed at the centre of the line joining two point charges +q and +q as shown in figure. The ratio of charges Q and q is

For the equilibrium of charge Q, the force applied by both the charges i.e. another Q and q should be equal in magnitude... View Article

A dipole is placed parallel to the electric field. If W is the work done in rotating the dipole by 60, then the work done in rotating it by 180º is

A dipole is placed parallel to the electric field. If W is the work done in rotating the dipole by 60, then the work done in rotating it by... View Article

A current i ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is_______

A current i ampere flows along an infinitely long straight thin-walled tube, then the magnetic induction at any point inside the tube is zero... View Article

The transformer is used to light 100 W –110 V lamps from 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is a. 90% b. 95% c. 96% d. 99%

The correct answer is a. 90% P=VI... View Article

The flux linked with a coil at any instant ‘t’ is given by ϕ=10t²−50t+250. The induced emf at t=3s is

Given According to the given data ϕ=10t2−50t+250. t=3s Find out We have to determine the induced emf at the given... View Article

The potential difference V_A−V_Bbetween points, A and B for the circuit segment shown in the figure at the given instant is

Given As per the given diagram We get to know that the current in the circuit is I=3A Find out We have to determine the... View Article

A particle executes SHM with amplitude 0.4 m and time period 24 s. The distance travelled by the particle in 10 s is (initially particle is at its mean position)

Given: According to the given data Amplitude = 0.4 m Time period = 24 s. Find out We have to determine the distance... View Article

Assertion: Mass of a body decreases slightly when it is negatively charged. Reason: Charging is due to the transfer of electrons. (A) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion (B) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion (C) Assertion is correct but Reason is incorrect (D) Assertion is incorrect but Reason is correct

The correct answer is an option (D) Assertion is incorrect but the Reason is correct If a body has an excess of electrons, it is said to be... View Article

Determine the period of small oscillations of the block of mass m as shown in the figure (The springs are ideal and pulleys are massless?)

A point mass M is suspended from the end of a light inextensible string whose upper end is fixed to a rigid support. The mass is displaced from... View Article

M	T	W	T	F	S	S
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3	4	5	6	7	8	9
10	11	12	13	14	15	16
17	18	19	20	21	22	23
24	25	26	27	28	29	30
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