Assignment
1. (a) Define the following.
(i) electromotive force (ii) internal resistance of a...
Assignment
1. (a) Define the following.
(i) electromotive force (ii) internal resistance of a cell (iii) lost volt (iv) electrical charge (v) potential difference (vi) electrical resistance
(b) State Ohm's law.
(c) State what the following units measure. (i) volt (ii) ampere (iii) ohm
(d) What instrument is used to measure each of the following? (i) current (ii) voltage (iii) electromotive force
2. (a) Derive an expression for the resistance of three conductors connected in (i) series (ii)parallel
(b) A cell has an e. m.f of 2.0 V and internal resistance of 1.5 ohm and is connected to two resistance 3 and 4 ohms in series. Find the current flowing and potential difference across the ends of each resistor.
Answers: 1
Physics, 21.06.2019 22:20
Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)
Answers: 1
Physics, 22.06.2019 04:30
The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^β2m on an edge at the ocean's surface, decrease by 7.5 x 10β10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^β2, delta v=7.5x10^β10. at some point l needs to be cubed. why p is divided by delta v?
Answers: 2
Physics, 22.06.2019 09:00
What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.
Answers: 2
Physics, 22.06.2019 18:30
Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.
Answers: 1
Mathematics, 22.01.2021 23:20
English, 22.01.2021 23:20
Mathematics, 22.01.2021 23:20
History, 22.01.2021 23:20
Mathematics, 22.01.2021 23:20
Mathematics, 22.01.2021 23:20
Chemistry, 22.01.2021 23:20
Biology, 22.01.2021 23:20
History, 22.01.2021 23:20
Advanced Placement (AP), 22.01.2021 23:20
History, 22.01.2021 23:20
Mathematics, 22.01.2021 23:20
Mathematics, 22.01.2021 23:20
English, 22.01.2021 23:20
Mathematics, 22.01.2021 23:20