Physics Answers

A particle with mass 1.81 x 10-3 kg and a charge of 1.22 x 10-8 C has, at a given instant, a velocity 𝑣𝑣⃑ = (3.00 × 104 𝑚𝑚 𝑠𝑠 )𝚥𝚥̂. What are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field 𝐵𝐵�⃑ = (1.63 𝑇𝑇)𝚤𝚤̂+ (0.980 𝑇𝑇)𝚥𝚥̂̂?

A ball with mass of 0.2 kg collides with wall with a speed of 10 m/s at a right angle and rebounds with the same speed in the opposite direction. If the contact time between the ball and the wall is 0.1 s. What is the force exerted on the ball by the wall?

A block system of tire pullings has an efficiency of 70%.Calculate, the effort that will be required to raise a load of 42.00N

If an charged object transfers its charges to another uncharged object will it mass be affected? And how does it transfers its charges?

Objective: Distinguish between electromotive forces and potential differences.

Material: A circuit Diagram

Procedure:

1. Draw a circuit diagram with two batteries, 1 light bulb, and switch. You can apply your creativity provided that the appropriate symbols are used.
2. Label the electromotive force and the potential difference.

Question: How does an electromotive force differ from potential difference?

The current drawn from the cell when the wire is connected across A as shown is 0.3A but reduced to 0.25A, when the wire is removed leaving

A. Alone connected to the the cell determine

B. The E.M.F of the cell

C. The internal resistance of the cell

Three resistors with values of 60.0Ω, 30.0 Ω, and 20.0 Ω, respectively, are

connected in series to a 110.0 V battery of negligible internal resistance. (a) Draw a circuit diagram and find the (b) equivalent resistance of the combined resistors, (c) current flowing through each resistor, (d) voltage drop across each resistor.

Four resistors when connected in series give an equivalent

resistance if 75.0 Ω. Three of the resistors have values 18.0 Ω, 6.0 Ω, and

24.0 Ω, respectively. What is the resistance of the fourth resistor?

What resistance must be connected in parallel to 60 Ω resistor to

reduce the combined resistance of 15 Ω?

Four resistors when connected in series give an equivalent

resistance if 75.0 Ω. Three of the resistors have values 18.0 Ω, 6.0 Ω, and

24.0 Ω, respectively. What is the resistance of the fourth resistor?