1. Based on the figure below, determine the electric current through R_{1}.

__Known :__

Resistor 1 (R_{1}) = 4 Ω

Resistor 2 (R_{2}) = 4 Ω

Resistor 3 (R_{3}) = 8 Ω

Electric voltage (V) = 40 Volt

Gurumuda.Net

1. Based on the figure below, determine the electric current through R_{1}.

__Known :__

Resistor 1 (R_{1}) = 4 Ω

Resistor 2 (R_{2}) = 4 Ω

Resistor 3 (R_{3}) = 8 Ω

Electric voltage (V) = 40 Volt

**3 Mechanical waves (Frequency Period Wavelength The wave speed) – Problems and Solutions**

1. Two corks are on the crests of the waves. Both move up and down over the surface of sea 20 times in 4 seconds. If the distance of both corks is 100 cm and between them, there are two troughs and one crest, determine the wave frequency and the wave speed.

__Known :__

Both corks are at the tops of the waves and between the two corks, there are 2 troughs and 1 crest (see figure). So there are two wavelengths between the two corks.

1. Light with wavelength of 500 nm passes through a slit 0.2 mm wide. The diffraction pattern on a screen 60 cm away. Determine the distance between the central maximum and the second minimum.

__Known :__

1. d is the distance between 2 slits, L is the distance between the slit and the viewing screen, P_{2} is the distance between the second-order fringe and the center of the screen. Determine the wavelength of light (1 Å = 10^{-10} m).

__Known :__

Distance between two slits (d) = 1 mm = 1 x 10^{-3} m

Distance between slit and the viewing screen (L) = 1 m

Distance between the second-order fringe and the central fringe (P_{2}) = 1 mm = 1 x 10^{-3} m

Order (n) = 2

1. A hollow cylindrical object (I = m R^{2}) moves to roll without slipping up a rough inclined plane with an initial velocity of 10 m/s. The inclined plane has an elevation angle θ with tan θ = 0.75. If the gravitational acceleration g = 10 m.s^{-2}, the velocity of the object is reduced to 5 m.s^{-1} then the distance on the inclined plane of the object is…

__Known :__

Moment of inertia of the hollow cylinder (I) = m R^{2}

Elevation angle = θ , where tan θ = 0.75 = 75/100 = opp / adj

Sin θ = opp / hyp = 75/125 = 3/5 = 0.6

Acceleration due to gravity (g) = 10 m/s^{2}

Initial velocity (v_{o}) = 10 m/s

Final velocity (v_{t}) = 5 m/s

1. Determine the electrical energy in the circuit shown in the figure below (1 µF = 10^{-6} F)

__Known :__

Capacitor 1 (C_{1}) = 3 µF

Capacitor 2 (C_{2}) = 1 µF

Capacitor 3 (C_{3}) = 2 µF

Capacitor 4 (C_{4}) = 6 µF

Capacitor 5 (C_{5}) = 4 µF

Electric voltage (V) = 5 volt

1. Which of the following figures shows the correct direction of magnetic induction due to the wire carrying the electric current …

**3 Electric charges Magnetic field and Magnetic forces – Problems and Solutions**

1. If q is the positive electric charge, v is the charge motion, B is the magnetic field and F is the direction of the magnetic force, then the right figure for a charge across the magnetic field is …

1. Wire P carrying current 6-A upward as shown in the figure below. If µ_{o} = 4π.10^{-7} wb A^{-1} m^{-1} and there is a repulsive force between wire P and Q 1.2.10^{-5} N.m^{–}1. Determine the magnitude and direction of electric current on wire Q.

__Known :__

I_{P} = 6 Ampere

µ_{o} = 4π x 10^{-7} wb A^{-1 }m^{-1}

F/l = 1,2 x 10^{-5} N m^{-1}

L = 1 meter

You cannot copy content of this page