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alevel考试物理是alevel考试中很重要的一门考试,下面课窝A-level考试网小编给你介绍的是alevel考试物理真题+解析。
答案：C
The power of passengers can be calculated by F*V=20*60*9.81*0.75=8.8kW. So the total power is 8.8kW.
答案：D
The temperature is constant when melting.
答案：B
4=ρRgx, 7=ρQgy, ρQ=2ρR, so 7x/8.
答案：D
The metal can go back to the original point， so the metal is still in elastic statement.
答案：A
The gradient of extension-load graph is 1/spring constant. The gradient is 0.125, so the spring constant is 8N/m.
答案：C
Total extension =strain*original length. Total strain=stress/E1+stress/E2. So the answer is 5.7*106Pa.
答案：C
From the graph the period is 3.5ms， the amplitude is 6.7mm.
答案：A
The resistance of the wire is 12/0.83=14.45Ω, the total length is 36m, so the answer is 0.04Ω.
答案：A
The total potential difference is 0.4V，the total resistance is 4Ω，so the current is 0.1A.
答案：A
When the intensity is increased，the resistance of LDR will decrease，so the current will increase.
答案：B
When the galvanometer is 0，the potential of PS is 5mV，so the total potential of PQ is 12.5mV. According to the potential is proportional to the resistance，the answer is 795.
答案：B
The potential of V4 is 2，the potential of V3 is 3.
答案：C
Intensity is directly proportional to the amplitude2&frequency2.
答案：C
The particle is at its maximum velocity when it is in equilibrium position.
答案：C
According to the corresponding formula，the wide length of diffraction is larger than double-slit interference，but the intensity is less.
答案：C
X is the bright pattern，so the path difference is λ.
答案：A
Learn it from the electric field of two same charged particles and repulsive particles.
答案：D
qEx=Ek, so Ek is proportional to the x.
答案： B
The potential difference is proportional to the resistance in series circuit.
答案：A
R=ρ1/A, A =πd2/4.
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