Answers Two 2.0Ω resistors can be combined circuit to give an overall resistance of Two 2.0Ω resistors can be combined circuit to give an overall resistance of A. 0.5Ω only B. 1.0… Read More
Answers An electric iron rated 250 V has a coil of resistance 125Ω. What is the… An electric iron rated 250 V has a coil of resistance 125Ω. What is the cost of using… Read More
Answers To keep a lorry moving at a constant speed v, requires power p, from the… To keep a lorry moving at a constant speed v, requires power p, from the engine. The force… Read More
Answers A wave travels a distance of 20 cm in 3s. The distance between successive crests… A wave travels a distance of 20 cm in 3s. The distance between successive crests of the wave… Read More
Answers A man at the back of a crowd watches a parade by holding a plane… A man at the back of a crowd watches a parade by holding a plane mirror just above… Read More
Answers In a simple pendulum experiment, a boy observed that the times for 30 oscillations are… In a simple pendulum experiment, a boy observed that the times for 30 oscillations are 70.0s, 72.0s and… Read More
Answers If a positively charged glass-rod is used to charge an electroscope X by contact and… If a positively charged glass-rod is used to charge an electroscope X by contact and an electroscope Y… Read More
Answers Two forces forming a couple are separated by a distance of 25cm. If one of… Two forces forming a couple are separated by a distance of 25cm. If one of the forces equals… Read More
Answers A radioactive substance has a half-life of 3 minutes. After 9 minutes, the count rate… A radioactive substance has a half-life of 3 minutes. After 9 minutes, the count rate was observed to… Read More
Answers Which of the following is NOT part of an a.c generator? Which of the following is NOT part of an a.c generator? A. Commutator B. Armature C. Field magnet… Read More