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. July 2016

R-C Circuit

Q- A 2.00-nF capacitor with an initial charge of 5.10 µC is discharged through a 1.30-kW resistor.

(a) Calculate the current in the resistor 9.00 µS after the resistor is connected across the terminals of the capacitor.

(b) What charge remains on the capacitor after 8.00 µS?

(c) What is the m…

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 Posted in Capacitors

Projectile Motion

Q- A ball is thrown at 20 m/s at an angle of 300 to the horizontal. It is thrown in the direction of a wall which is 5m away on the ground, and 2m high. Does the ball go over the wall, or does it collide with the wall?

Solution:

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 Posted in Motion_2D

Network (Resistances)

Q- Consider the circuit below.

a) Find the equivalent resistance of the combination.

b) If a 10V potential difference (PD) is applied across the points A and B, find the PD across the 4Ω resistor and current in it.

Solution:

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 Posted in Current Electricity

Standing Wave on String

Q- A uniform string of linear density 10g/m is tied to the ceiling of an elevator. A 5kg mass is hung from the other end of the string at a point 1m from the ceiling. If the elevator accelerates upward at 0.10g what is the fundamental frequency of the string?

Solution:

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 Posted in Sound

Kirchhoff's Law

Q. Consider the circuit below.

a) Reduce the circuit to a two loop circuit and redraw the circuit showing the directions of the currents I1, I2 and I3. (Take I2 to flow through the central section of the circuit).

b) Using two clockwise traverse loops for the left and right sections of the circu…

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 Posted in Current Electricity

Collision

Q- A block of mass m1 = 4kg moves to the right with a speed of v1 = 10m/s toward a second block of mass m2 = 5kg that moves to the left with a speed v2 =3m/s. after the blocks collide head on; it is found that the m1 remains stationary. Determine the coefficient of restitution between the two blocks…

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 Posted in NLM
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