Subject: Physics, asked on 20/5/18

## Example 91: In the given circuit as shown in Fig. 2(a). 56, in the steady state, obtain the expressions for (i) potential drop (ii) the charge and (iii) the energy stored in the capacitor C. Example 3: Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.

Subject: Physics, asked on 20/5/18

## In the given circuit as shown in Fig. 2(a). 56, in the steady state, obtain the expressions for (i) potential drop (ii) the charge and (iii) the energy stored in the capacitor C. Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.

Subject: Physics, asked on 20/5/18

## Can we ignore battery in a circuit when no current is passing through it

Subject: Physics, asked on 20/5/18

## In the given circuit as shown in Fig. 2(a). 56, in the steady state, obtain the expressions for (i) potential drop (ii) the charge and (iii) the energy stored in the capacitor C. Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.

Subject: Physics, asked on 19/5/18

## when should we use biot savart law and when should we use amperes circuitant law for finding B(magnetic field) as both can be used . thank you​

Subject: Physics, asked on 19/5/18

## A hollow sphere and a solid sphere, both having the same mass of 5 kg and radius 10 m are initially at rest. If they are made to roll down the same inclined plane without slipping, the ratio of their speeds when they reach the bottom of the plane vhollow / vsolid (A) X 1               (B) $\frac{7}{\sqrt{10}}$               (C) $\frac{7}{\sqrt{12}}$                (D) $\frac{\sqrt{21}}{\sqrt{25}}$

Subject: Physics, asked on 19/5/18

## Solve this: Q.4. A trolley of mass 20 kg carries 16 kg grain and moves on a horizontal smooth and straight track at 20 m${s}^{-1}$. If the grain starts leaking out of a hole at the bottom at time t = 0 s at the rate of 0.5 kgs-1, the speed of the trolley at t = 22 s will be nearly A. 13.5 m${s}^{-1}$ B. 15 m${s}^{-1}$ C. 24 m${s}^{-1}$ D. 26 m${s}^{-1}$

Subject: Physics, asked on 15/5/18

## Explain the principle construction and working of moving coil galvanometer

Subject: Physics, asked on 13/5/18

## Solve this: Q.48. A rectangular coil of 300 turns has an average area of 25 cm $×$ 10 cm. The coil rotates with a speed of 50 cps in a uniform magnetic field of strength 4  about an axis perpendicular to the field. The peak value of the induced emf is (in volt) 1) 3 $\mathrm{\pi }$ 2) 30 $\mathrm{\pi }$ 3) 300 $\mathrm{\pi }$ 4) 3000 $\mathrm{\pi }$

Subject: Physics, asked on 9/5/18

## What is the relation between velocities at highest and lowest point in vertical circular motion? (for eg. velocity at highest point is given sqrt(3gr) then a formula to obtain velocity at lowest point directly)

Subject: Physics, asked on 7/5/18

## How does resonance condition helps to accelarate charged particles?

Subject: Physics, asked on 6/5/18

## Derive an expression for the force experienced by a moving charge in a magnetic field?

Subject: Physics, asked on 6/5/18

## What is the principle of velocity selector?explain

Subject: Physics, asked on 2/5/18

## describe the dimensional formula of calorie

Subject: Physics, asked on 2/5/18

## Plz ans 14 Q.14. A bus begins to move with an acceleration of 1 m${s}^{-2}$. A man who is 48 m behind the bus starts running at 10 m${s}^{-1}$ to catch the bus. The man will be able to catch the bus after (a) 6 s (b) 5 s (c) 3 s (d) 7 s (e) 8 s

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