D1
D2
D4
Mix
100
The work done moving a mass from infinity to a point in a gravitational field.
What is gravitational potential energy?
100
The work done per unit charge in bringing a small positive test charge from infinity to a point in an electric field
What is electric potential?
100
The graph of induced emf is like this.
What is a positive sine graph.
100
True or false?
Lenz’s law states that an induced current must flow in a direction that repels any magnet.
What is false?
200
In an orbit, this is decreased due to the viscous drag of the atmosphere
What is altitude/speed?
200
The lines that connect all points with the same electric potential
What are equipotential lines?
200
A permanent magnet is moved at a constant speed through a coil with a large number of turns, N. What is the induced emf equivalent to?
What is the rate of change of magnetic flux through the coil multiplied by
200
Fill in the blanks:
Magnetic (1) is measured in (2) and magnetic (3) is measured in webers per metre squared. One (4) is equivalent to one weber per metre squared.
What is (1) field strength, (2) tesla, (3) flux density, (4) tesla?
300
It is proportional to the inverse square of the distance from the planet.
What is gravitational field strength?
300
This is where the electric potential energy is considered zero.
What is infinity
300
This case shows equation: 𝜙=Bvl
What is the case for changing area?
300
Electric potential is inversely proportional to this.
What is the distance from charge?
400
Gravitational potential is constant here.
What is an equipotential surface?
400
The work that was done to assemble the system of charges
What is the electric potential energy?
400
What is Lenz's law?
What is an induced current will always act to oppose the change that caused it.
400
A satellite is orbiting a planet of mass M at a distance r with orbital speed v.
Determine the orbital speed of the satellite when its distance from the planet decreases to r/4
What is 2 * sqrt(GM/r)
500
The minimum speed needed by a mass to escape the gravitational field of a planet
What is the escape speed?
500
This is arrow is the direction of the field.
What is A?
500
A drone of width 3.00 m is flying horizontally at a speed of 1.50 × 10^2 m s−1. The Earth's magnetic field at this point is 50.0 μT, perpendicular to the direction of the velocity of the drone. What is the induced emf between each side of the drone?
What is 22.5 mV ?
500
At this point, the magnitude of the electric field strength at a minimum.
What is C?