1. Find (a) the magnitude of an electrons electric field at 50.0 cm away from the electron. (b) if the another electron is placed at this distance, what would be the magnitude of electrostatic force between the electrons? (c) Is the force attractive or repulsive?
2. Two charges, Q 1 = +1.5 x 10 -8 C and Q 2 = +3.0 x 10 -8 C are 100 mm apart. What is the magnitude of the electric field halfway between them?
If the electric field in the region has a magnitude of 2.0 x 10 3 N/C and passing through the surface with an area 0.0214 m 2 . The area vector is oriented at an angle of 50 0 with respect to the electric field. Find the electric flux.
The work done on a 5.0 C charge is 7.5 J as it is moved from point A, where the potential difference is 2.0 V, to another point B. What is the electric potential difference between points A and points B? What is the potential at point B?
The plates of a parallel-plate capacitor are 5.00 mm apart and 2.00 m 2 in area. A potential difference of 10,000 volts is applied across the capacitor. Compute the capacitance, the charge on the plate and the magnitude of the electric field in the space between them.
The parallel plates of a capacitor have an area of 2.00 x 10 -1 m 2 and have a separation distance of 1.00 x 10 -2 m and are connected to 3000 volts power supply.
The capacitor is then disconnected from the supply, and an dielectric is inserted between the plates, Find that the potential difference decreases to 1000 volts while the charge on each plate remain constant.
Two capacitors one is 491 µF and the other is 30 µF are connected in series across a 12 volts battery. Find the equivalent capacitance of the combination, the charge on each capacitor and the potential difference across it.
Two capacitor one is 5 F and the other 2 F are connected in parallel across a 100 volts battery. Find the equivalent capacitance of the combination, the charge of each and the potential difference on each capacitor.
A 491 gauge copper wire has a nominal diameter of 0.64 mm. This wire carries a constant current of 1.67 A to a 4,910 watts lamp. The density of free electron is 8.5 x 10 28 electrons/m 3 . Find the current density and the magnitude of drift velocity.
Property of the conducting medium that weakens the transmission of electric current.
Denoted as R and its unit is Ohm ( Ω ) .
Where: R = Resistance (Ohm, Ω ) ρ = resistivity ( Ω m) L = Length of the wire (m) A = cross-sectional area of a wire(m 2 )
0.0038 1.6 x 10-8 Silver 0.0036 11 x 10-8 Platinum 0.00088 98 x 10-8 Mercury 0.0043 21 x 10-8 Lead 0.005 12 x 10-8 Iron 0.0039 1.7 x 10-8 Copper 0.0039 2.6 x 10-8 Aluminum α (k -1 ) ρ (Ω.m) Substance and their temperature coefficient. Approximate resistivities (at 20 0 C)
Resistors R 1 = 2.00 ohms, R 2 = 3.00 ohms and R 3 = 4.00 ohms are in series connection with a voltage source of 100.0 volts. Find the equivalent resistance, electric current and electric potential difference.
Resistors R 1 = 3.00 ohms, R 2 = 5.00 ohms and R 3 = 7.00 ohms are in parallel connection with a voltage source of 110.0 volts. Find the equivalent resistance, electric current and electric potential difference.
A resistor with resistance R=1.0 x 10 6 Ω , capacitor with capacitance C=2.2 x 10 -6 F, a voltage source with ε = 100 v, and a switch are all connected in a single loop series circuit. The switch is initially open. When the switch is closed, calculate:
What is the magnitude of the magnetic field 6.1 m below a power line in which there is a steady current of 100 A?
Field along a solenoid:
A solenoid of length 30.0 cm and radius 2.0 cm is closely winded with 200 turns of wire. The current in the winding is 5.0 A. Compute the magnetic field magnitude at a point near the center of the solenoid.
A single loop of wire with an enclosed area of 6.00 cm 2 is in a region of uniform magnetic field, with the field perpendicular to the plane of the loop. The magnetic field is decreasing at a constant rate of 0.150 T/s.
What is the induced emf ?
If the loop has a resistance of 0.300 ohms what is the current induced in the loop?
A 160 Ω resistor, 15.0 µF capacitor and 230 mH inductor are connected to form RLC circuit with an ac generator whose conducting loop rotates at 60.0 full rotation per second and with emf amplitude of 36.0 V.
The angle of incident ( θ i ) is equal to the angle of reflection ( θ r )
θ i θ r θ i = 0 θ r = 0 Mirror A The light is parallel to The plane of mirror. No Reflection. Mirror B Light is reflected at an angle. θ i = θ r A B Mirror C Incident and reflected Light are both perpendicular To the plane of mirror. θ i - θ r =0 C