Other Physics Answers

Capacitors of 2μF and 6μF are connected to a 100V battery. How much charge I supplied by the battery in charging the capacitors when (a) they are connected in series and (b) when they are connected in parallel?

A solenoid is 3 cm long and has a radius of 0.50 cm. The wire carries 2.0 A of current. The magnetic field at the center is A. 0.0419 T b. 0.099 T C. 0.0013 T D. 20 T

24. Two 50 µF capacitor are connected in series. The equivalent capacitance of the combination is A. 25 µF B. 100 µF C. 50 µF D.200 µF 25. Two 50 µF capacitor are connected in parallel. The equivalent capacitance of the combination is A. 25 µF B. 100 µF C. 50 µF D. 200 µF

When a slab of insulating material is placed between the plates of a charged capacitor, the electric field becomes A. less B. similar C. greater D. depends on the situation 21. A capacitor has a charge of 0..02 C when connected with a 0 V battery. The capacitance is A. 1 µF B. 4 µF C. 2 µF D. 40 µF 22. A 50 µF has a potential difference of 8 V. What is its charge? A. 4 x 10-3 C B. 6.25 x 10-5 C C. 4 x 10-4 C D. 6.25 x 10-6 C 23. A parallel plate capacitor has an energy of 2.5 J. It must be placed in a potential difference of A. 150 V B. 350 V C. 500 V D. 0.25 MV

A uniform electric field of 500 N/C is established between two oppositely charged metal plates. A particle with a charge of +0.003 C is moved from the bottom (negatively charged) plate. The string is tied to the charged that is pulling it upward. The distance between the plates is 5 cm.

a.      What is the change in the potential energy of the charge?

b.      What is the change in electric potential from the bottom to the top plate? 

An object has a launch velocity of 30.0 m/s at launch angle of 30.00 relative to horizontal. Find the a) x and y component of initial velocity, b) time to reach the peak c) total time of flight, d) vertical height to reach the peak, and e) horizontal distance. 

A projectile has an initial launch speed of 18.0 m/s. If it is desired that it strikes a target 31.0 m away at the same elevation, what should be the projection angle?

A body moving with an initial velocity 6ms~-¹ accelerates uniformly at a rate of 50ms~-¹.What is the distance covered during this period

A ball is thrown vertically upwards with an initial velocity of 30 m/s.

Using a time step of 0.02 s up to 6.20 s, plot the graph of the vertical distance versus time for this ball.

Hint ; Motion under gravity is described by the equation : 𝑣𝑦 = 𝑣𝑜𝑦𝑡 +1/2𝑔𝑡^2

and gravitational acceleration 𝑔 is here taken as negative.

(i) To what maximum height does the ball rise?

(ii) What is the index of time at maximum height?

(iii) How long does it take the ball to ascend to maximum height?

(iv) How long does it take the ball to hit the ground?

(v) What happens to the ball if the sign for gravitational acceleration is taken as positive?

Two cats A and B, jump from the top of a vertical cliff. Cat A just drops and reaches the ground in 3.50secs, while cat B jumps horizontally with an initial speed of 95cm/secs. How far from the base of the cliff will cat B hit the ground?